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Researchers at the Korea Advanced Institute of Science and Technology (KAIST) have developed new organic PV cells suitable for wearable electronics. According to KAIST, the cells can be stretched by up to 40%, making them highly versatile and practical for a variety of applications.
January 5, 2024 Lior Kahana
Image: KAIST
These incredible solar cells were detailed in a recent statement by KAIST. The statement reports that the cells demonstrate a conversion efficiency of 19% even when stretched, making them the highest-performing stretchable solar cells in the world.
“The team conjugated a highly stretchable polymer to an electrically conductive polymer with excellent electrical properties through chemical bonding and developed a new conductive polymer with electrical conductivity and mechanical stretchability,” the researchers said. This advancement exceeds the capability of existing devices tenfold.
A comprehensive description of the technology and its development was presented in “Rigid and Soft Block-Copolymerized Conjugated Polymers Enable High-Performance Intrinsically-Stretchable Organic Solar Cells,” which was recently published on Joule. The research details the use of rigid and soft blocks in the development of the solar cells to create amazing electrical properties and mechanical stretchability.
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“We use rigid D18 and soft PEHDT blocks to synthesize block-copolymerized PDs (D180.8-s-PEHDT0.2), which offer high electrical properties and mechanical stretchability,” the scientists said. “The D180.8-s-PEHDT0.2-organic solar cells (OSCs) excel beyond their D18- and PEHDT-based OSC counterparts by overcoming the traditional power conversion efficiency-stretchability trade-off.”
The research behind this technology was conducted by Prof. Bumjoon Kim and their team from KAIST’s Department of Chemical and Biomolecular Engineering.
“ Through this research, we not only formed the world’s best performing stretchable organic solar cell, but it is also significant that we developed a new polymer that can be applicable as a base material for various electronic devices that need to be malleable and/or elastic,” said Kim.
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